On 16 August 1812, a force comprised mainly of British Regulars and Canadian Militiamen totaling 1360 crossed the Detroit River under the command of Major General Isaac Brock to attack Fort Detroit. Defended by Brigadier General William Hull and a force of approximately 2500, it was by a series of ruses and feints that Brock led his opponent to believe that the besieging force as much stronger that it actually was. As a result, Fort Detroit was surrendered to Brock with few losses on either side. The strength of 1360 for Brock's force does not include the First Nations warriors that were present, and the number is taken from the published Prize Money list for those eligible for reward for being present at the action (see the list below).

In 2012, the Canadian Government decided to award Battle Honours to War of 1812 units and to link these honours to perpetuating modern Canadian Army units. Eleven separate Battle Honours were awarded to units of the Canadian Militia at Detroit. These eleven honours are perpetuated today by five infantry regiments, one armoured reconnaissance regiment and one artillery regiment of the Canadian Army.

Out of Brock's force of 1360 officers, non-commissioned officers and men, 1076 belonged to line infantry units which might be eligible for battle honours. Of these, 302 were on the roll of the 41st Regiment and 774 belonged to the Canadian Militia regiments at Detroit.

540 of those present (70% of 774) belonged to the regiments of Militia that are now perpetuated by the Essex & Kent Scottish Regiment. These are the 1st and 2nd Regiments of Essex Militia and the 1st Regiment of Kent Militia. The remaining 30%, or 234, share eight awarded Battle Honours and are now held by five perpetuating regiments:

The Queen's York Rangers perpetuate the 1st and 3rd Regiments York Militia which, combined, had 87 officers, NCOs and men present.

The Royal Canadian Regiment perpetuates the 1st Regiment of Oxford Militia and the 1st Regiment of Middlesex Militia which, combined, had one officer and 13 NCOs and men present at Detroit.

The largest single regimental presence by the Canadian Militia at Detroit for which a Battle Honour was awarded was the 1st Regiment Essex Militia which paraded 312 all ranks. The smallest single regimental presence by the Canadian Militia at Detroit for which a Battle Honour was awarded was the lone officer of the 1st Regiment of Middlesex Militia, followed by the 13 NCOs and soldiers of the 1st Regiment of Oxford Militia.